Vanadium-titanium sea sand ore contains carbon pellets and preparation method thereof

Abstract

The invention discloses a vanadium-titanium sea sand ore containing carbon pellet. The vanadium-titanium sea sand ore containing carbon pellet comprises the following components in percentage, by weight, 22% -28% of bituminous coal, 4% -7% of lean coal, 0% -62.5% of common vanadium-titanium ore and 10%-67.5% of vanadium-titanium sea sand ore, the vanadium-titanium sea sand ore containing the carbon pellets is hot-pressed carbon-containing pellets, the compressive strength is more than 3000N or higher, the high-proportioning amount of the sea sand ores is realized, and the utilization rate of the sea sand ores is remarkably improved. The vanadium-titanium sea sand ore containing carbon pellet also provides a preparation method of the vanadium-titanium sea sand ore, the preparation method comprises the following steps of S1, mixing the vanadium-titanium sea sand ore and ordinary vanadium-titanium ore, carrying out drying and sample grinding treatment on the bituminous coal and the lean coal in sequence, and uniformly mixing the vanadium-titanium sea sand ore according to the group distribution ratio of the carbon pellets of the vanadium-titanium sea sand ore, normal vanadium-titaniumore, bituminous coal and lean coal to obtain a mixed material; S2, heating the mixed material to a hot-pressing temperature, and then pressing to obtain the hot-pressing block; and S3, carrying out heat treatment on the hot-pressing block, so as to obtain the vanadium-titanium sea sand ore hot-pressed carbon-containing pellet. The method is simple in process and low in cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a vanadium-titanium sea placer carbon-containing pellet and a preparation method thereof. Background technique [0002] Vanadium-titanium sea placer is a kind of secondary enriched iron placer ore formed by the action of rivers, waves, tides and ocean currents in the coastal area. Its main useful mineral components are vanadium, titanium, iron, etc. After beneficiation, it can be Iron concentrate containing vanadium and titanium is obtained. Vanadium-titanium sea placer is currently recognized as a difficult-to-select and difficult-to-smelt iron ore resource in the world. Vanadium-titanium sea placer has regular particle shape, smooth and dense surface, coarser particle size, higher hardness and melting point, and poorer ball milling performance and pelletizing performance than other iron ores. The vanadium-titanium sea placer contains a small amount of ilmenite ...

AI Technical Summary

Problems solved by technology

The blast furnace method is to add vanadium-titanium sea sand ore to ordinary iron ore for sintering and then enter the blast furnace for smelting. During the smelting process, most of the vanadium is selectively reduced into molten iron, while titanium enters the slag; the disadvantage of the blast furnace method is that sea sand is mixed into Low amount and high blast furnace temperature cause TiO 2 Reduction increases the difficulty of smelting, and there is no effective recovery method for titanium in slag, etc.

The non-blast furnace method is a smelting method in which vanadium-titanium sea sand ore is pelletized and roasted, then pre-reduced, and then smelted in an electric furnace to generate vanadium-containing molten iron and slag. The disadvantages include low titanium recovery rate, complicated smelting process and high cost.

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